indifferently vs passably

indifferently

adv
  • Tolerably; passably. 

  • Without distinction; impartially, objectively. 

  • Without great care; without sufficient attention or thought. 

passably

adv
  • In a passable fashion; moderately; adequately. 

How often have the words indifferently and passably occurred in a corpus of books? (source: Google Ngram Viewer )